This clinical research study will evaluate the safety and effectiveness of two doses of an investigational medication (ciclesonide nasal aerosol) for the treatment of subjects with of seasonal allergic rhinitis (SAR). The study will consist of a Screening Period to confirm study eligibility, followed by a Single-Blind Placebo Run-in period to acclimate subjects to the proper use of the study medication and to assess the subject's severity of SAR symptoms, followed by a 2-week double-blind treatment period to assess the safety and effectiveness of the study medication when given to eligible subjects.